yea... just mess w/ it yourself... don't force anything and don't mess with the trussrod too much and you should be fine.

String height is just a matter of personal preference

Intonation is done by using a tuner.. check the harmonic and the fretted note on the 12th fret.
If the fretted note is sharp, make the string longer.

Trussrod adjustments are done by depressing the first and last frets and measuring the height at the 12th fret. Don't use metal feeler gauges as they could scratch the frets. The repair tech and ernie ball said that one thin plastic guitar pick is about the right action, once you're in the ballpark, its personal preference again.

Search the web for tips, but messing with it yourself is the best way to learn.

Hit your local library. Mine gave me access to all the info I have ever needed and most of the good books come with pictures. With the exception of radical changes to the truss rod everything else on a bass is mostly a twist of a screw and its pretty hard to do any real damage.